Fittings included with your tank

25 mm outlet

400 mm leaf screen & solar shield

100 mm overflow

Hand watering

Washing machine

Toilet flushes


Product example

1000mm x 1600mm x 1500mm



 inc GST.

Select your colour

Our corrugated slimline water tanks are built for narrow spaces with limited access and are ideal for the sides of houses or fences. They are available in a range of colours, come with a corrosion and construction warranty, and have internal stainless-steel bracing for maximum strength and durability. With their rigid cross-bracing system, our slimline water tanks won’t bulge or bow like plastic tanks and hold from 600 up to 10,000 litres of water.


Benefits of a Tanksalot® Slimline Tank
  • Capacity from 600L to 10,000L.
  • Available in a range of standard sizes or made to measure.
  • Narrow shape can fit in a small space.
  • Retention (reuse), Detention (slow release) and dual-purpose tanks.
  • Comes fitted with all fittings for easier installation.
  • No BPA and no UV Stabilisers as found in plastic tanks.
  • Rigid cross-bracing system won’t bulge or bow like plastic tanks.
  • Fire resistant – steel is a non-combustible material.
  • Seismic tank restraint system (PS1 available).
  • Modern, architectural styling.
  • Warranty – 20-years corrosion & 10-year manufacturing.


A retention water tank is designed to capture and store stormwater runoff for later use. It retains the water on-site, preventing it from immediately entering the drainage system. This stored water can be used for irrigation, landscaping, or other non-potable purposes, contributing to sustainable water management practices. Retention tanks help reduce the demand on municipal water supplies and mitigate the impact of urban development on local water resources.

A detention water tank is primarily focussed on controlling the flow and release of stormwater to prevent flooding and erosion. Detention tanks temporarily hold and slowly release stormwater into the drainage system at a controlled rate. This helps manage peak flows during heavy rainfall, reducing the risk of downstream flooding and erosion.

It generally takes three weeks to turn around a tank order excluding delivery. Contact us to discuss your requirements and we will confirm your lead time.
We deliver tanks to metropolitan Auckland for free and can arrange nationwide delivery. Contact us to discuss your requirements and we will prepare an estimate.

Seismic restraints are designed to secure water tanks and prevent them from tipping, sliding, or overturning during an earthquake. The ground shaking during seismic events can pose a significant risk to the stability of structures, including water tanks, and securing them is essential to ensure public safety and the integrity of water supply systems. Seismic restraints also help minimise the risk of damage to the tank itself and reduce the potential for water contamination or loss.

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